The two cavities, at the bottom and on the side, have a dual function: to hold the glass between two fingers without heating its contents and to aerate the wine, whose molecules open through contact with the cavities. Hold the glass with both fingers. Move the glass quickly to aerate and break up the wine. Sniffing at the bottom of the buvant, you will perceive the heavy aromas (the alcohol). At the top, you will perceive the whole scale of aromas. Mouth-blown glass. Packaged in an elegant gift box. Delivery in 3-5 working days.